diesel/query_builder/
order_clause.rs

1simple_clause!(
2    /// DSL node that represents that no order clause is set
3    NoOrderClause,
4    /// DSL node that represents that an order clause is set
5    OrderClause,
6    " ORDER BY "
7);
8
9impl<'a, DB, Expr> From<OrderClause<Expr>> for Option<Box<dyn QueryFragment<DB> + Send + 'a>>
10where
11    DB: Backend,
12    Expr: QueryFragment<DB> + Send + 'a,
13{
14    fn from(order: OrderClause<Expr>) -> Self {
15        Some(Box::new(order.0))
16    }
17}
18
19impl<DB> From<NoOrderClause> for Option<Box<dyn QueryFragment<DB> + Send + '_>>
20where
21    DB: Backend,
22{
23    fn from(_: NoOrderClause) -> Self {
24        None
25    }
26}